The decay B* --> B gamma has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays, The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B* - B mass difference of 45.5 +/- 0.3 (stat.) +/- 0.8 (syst.) MeV/c(2). 95% confidence level upper limits at 6 MeV/c(2) are placed on both the isospin (i.e, B+-B-0) and the B-s-B-ud splitting of the mass difference, The production ratio of B* to B mesons in Z decays is measured to be 0.72 +/- 0.03 (stat.) +/- 0.06 (syst.). Limits on the production cross-section of other hypothetical excited B hadron states decaying radiatively are established. The differential B* cross section has been measured to be in good agreement with the average b fragmentation, yielding an average fractional B* energy of [x(E)] = 0.695 +/- 0.009 (stat.) +/- 0.013 (syst.). From the decay angular distribution the relative contribution of longitudinal B* polarisation states is measured to be sigma(L)/(sigma(L) + sigma(T)) = 0.32 +/- 0.04 (stat.) +/- 0.03 (syst.).

B-asterisk Production In Z-decays

BIANCHI, Fabrizio;MIGLIORE, Ernesto;ROMERO, Alessandra;
1995-01-01

Abstract

The decay B* --> B gamma has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays, The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B* - B mass difference of 45.5 +/- 0.3 (stat.) +/- 0.8 (syst.) MeV/c(2). 95% confidence level upper limits at 6 MeV/c(2) are placed on both the isospin (i.e, B+-B-0) and the B-s-B-ud splitting of the mass difference, The production ratio of B* to B mesons in Z decays is measured to be 0.72 +/- 0.03 (stat.) +/- 0.06 (syst.). Limits on the production cross-section of other hypothetical excited B hadron states decaying radiatively are established. The differential B* cross section has been measured to be in good agreement with the average b fragmentation, yielding an average fractional B* energy of [x(E)] = 0.695 +/- 0.009 (stat.) +/- 0.013 (syst.). From the decay angular distribution the relative contribution of longitudinal B* polarisation states is measured to be sigma(L)/(sigma(L) + sigma(T)) = 0.32 +/- 0.04 (stat.) +/- 0.03 (syst.).
1995
68
353
362
P. ABREU;W. ADAM;T. ADYE;E. AGASI;I. AJINENKO;R. ALEKSAN;G. D. ALEKSEEV;P. P. ALLPORT;S. ALMEHED;S. J. ALVSVAAG;U. AMALDI;S. AMATO;A. ANDREAZZA;M. L. ANDRIEUX;P. ANTILOGUS;W. D. APEL;Y. ARNOUD;B. ASMAN;J. E. AUGUSTIN;A. AUGUSTINUS;P. BAILLON;P. BAMBADE;F. BARAO;R. BARATE;D. Y. BARDIN;G. J. BARKER;A. BARONCELLI;O. BARRING;J. A. BARRIO;W. BARTL;M. J. BATES;M. BATTAGLIA;M. BAUBILLIER;J. BAUDOT;K. H. BECKS;M. BEGALLI;P. BEILLIERE;Y. BELOKOPYTOV;A. C. BENVENUTI;M. BERGGREN;D. BERTRAND;F. BIANCHI;M. BIGI;M. S. BILENKY;P. BILLOIR;D. BLOCH;M. BLUME;S. BLYTH;V. BOCCI;T. BOLOGNESE;M. BONESINI;W. BONIVENTO;P. S. L.;G. BORISOV;C. BOSIO;S. BOSWORTH;O. BOTNER;B. BOUQUET;C. BOURDARIOS;T. J. V.;M. BOZZO;P. BRANCHINI;K. D. BRAND;R. A. BRENNER;C. BRICMAN;L. BRILLAULT;R. C. A.;P. BRUCKMAN;J. M. BRUNET;L. BUGGE;T. BURAN;A. BUYS;M. CACCIA;M. CALVI;A. J. C.;T. CAMPORESI;V. CANALE;M. CANEPA;K. CANKOCAK;F. CAO;F. CARENA;P. CARRILHO;L. CARROLL;C. CASO;M. V. C.;A. CATTAI;F. R. CAVALLO;L. CERRITO;V. CHABAUD;P. CHARPENTIER;L. CHAUSSARD;J. CHAUVEAU;P. CHECCHIA;G. A. CHELKOV;R. CHIERICI;P. CHLIAPNIKOV;P. CHOCHULA;V. CHOROWICZ;V. CINDRO;P. COLLINS;J. L. CONTRERAS;R. CONTRI;E. CORTINA;G. COSME;F. COSSUTTI;H. B. CRAWLEY;D. CRENNELL;G. CROSETTI;J. C. MAESTRO;S. CZELLAR;E. DAHLJENSEN;J. DAHM;B. DALMAGNE;M. DAM;G. DAMGAARD;A. DAUM;P. D. DAUNCEY;M. DAVENPORT;W. DASILVA;C. DEFOIX;G. DELLARICCA;P. DELPIERRE;N. DEMARIA;A. DEANGELIS;H. DEBOECK;W. DEBOER;S. DEBRABANDERE;C. DECLERCQ;C. DELAVAISSIERE;B. DELOTTO;A. DEMIN;L. DEPAULA;C. DESAINTJEAN;H. DIJKSTRA;L. DICIACCIO;F. DJAMA;J. DOLBEAU;M. DONSZELMANN;K. DOROBA;M. DRACOS;J. DREES;K. A. DREES;M. DRIS;Y. DUFOUR;F. DUPONT;D. EDSALL;R. EHRET;G. EIGEN;T. EKELOF;G. EKSPONG;M. ELSING;J. P. ENGEL;N. ERSHAIDAT;B. ERZEN;M. E. SANTO;E. FALK;D. FASSOULIOTIS;M. FEINDT;A. FERRER;T. A. FILIPPAS;A. FIRESTONE;H. FOETH;E. FOKITIS;F. FONTANELLI;F. FORMENTI;B. FRANEK;P. FRENKIEL;D. C. FRIES;A. G. FRODESEN;R. FRUHWIRTH;F. FULDAQUENZER;H. FURSTENAU;J. FUSTER;A. GALLONI;D. GAMBA;M. GANDELMAN;C. GARCIA;J. GARCIA;C. GASPAR;U. GASPARINI;P. GAVILLET;E. N. GAZIS;D. GELE;J. P. GERBER;L. GERDYUKOV;M. GIBBS;D. GILLESPIE;R. GOKIELI;B. GOLOB;G. GOPAL;L. GORN;M. GORSKI;Y. GOUZ;V. GRACCO;E. GRAZIANI;G. GROSDIDIER;P. GUNNARSSON;M. GUNTHER;J. GUY;U. HAEDINGER;F. HAHN;M. HAHN;S. HAHN;Z. HAJDUK;A. HALLGREN;K. HAMACHER;W. HAO;F. J. HARRIS;V. HEDBERG;R. HENRIQUES;J. J. HERNANDEZ;P. HERQUET;H. HERR;T. L. HESSING;E. HIGON;H. J. HILKE;T. S. HILL;S. O. HOLMGREN;P. J. HOLT;D. HOLTHUIZEN;M. HOULDEN;J. HRUBEC;K. HUET;K. HULTQVIST;P. JOANNOU;J. N. JACKSON;R. JACOBSSON;P. JALOCHA;R. JANIK;G. JARLSKOG;P. JARRY;B. JEANMARIE;E. K. JOHANSSON;L. JONSSON;P. JONSSON;C. JORAM;P. JUILLOT;M. KAISER;G. KALMUS;F. KAPUSTA;M. KARLSSON;E. KARVELAS;S. KATSANEVAS;E. C. KATSOUFIS;R. KERANEN;B. A. KHOMENKO;N. N. KHOVANSKI;B. KING;N. J. KJAER;H. KLEIN;A. KLOVNING;P. KLUIT;J. H. KOEHNE;B. KOENE;P. KOKKINIAS;M. KORATZINOS;K. KORCYL;V. KOSTIOUKHINE;C. KOURKOUMELIS;O. KOUZNETSOV;P. H. KRAMER;M. KRAMMER;C. KREUTER;J. KROLIKOWSKI;I. KRONKVIST;Z. KRUMSTEIN;W. KRUPINSKI;P. KUBINEC;W. KUCEWICZ;K. KURVINEN;C. LACASTA;I. LAKTINEH;S. LAMBLOT;J. W. LAMSA;L. LANCERI;D. W. LANE;P. LANGEFELD;V. LAPIN;I. LAST;J. P. LAUGIER;R. LAUHAKANGAS;G. LEDER;F. LEDROIT;V. LEFEBURE;C. K. LEGAN;R. LEITNER;Y. LEMOIGNE;J. LEMONNE;G. LENZEN;V. LEPELTIER;T. LESIAK;D. LIKO;R. LINDNER;A. LIPNIACKA;I. LIPPI;B. LOERSTAD;M. LOKAJICEK;J. M. LOPEZ;A. LOPEZFERNANDEZ;M. A. L.;D. LOUKAS;P. LUTZ;L. LYONS;J. MACNAUGHTON;G. MAEHLUM;A. MAIO;V. MALYCHEV;J. MARCO;B. MARECHAL;M. MARGONI;J. C. MARIN;C. MARIOTTI;A. MARKOU;T. MARON;C. MARTINEZRIVERO;F. MARTINEZVIDAL;S. M. GARCIA;F. MATORRAS;C. MATTEUZZI;G. MATTHIAE;M. MAZZUCATO;M. MCCUBBIN;R. MCKAY;R. MCNULTY;J. MEDBO;C. MERONI;W. T. MEYER;M. MICHELOTTO;E. MIGLIORE;L. MIRABITO;U. MJOERNMARK;T. MOA;R. MOELLER;K. MOENIG;M. R. MONGE;P. MORETTINI;H. MUELLER;L. MUNDIM;W. A. MITAROFF;W. J. MURRAY;B. MURYN;G. MYATT;F. NARAGHI;F. L. NAVARRIA;S. NAVAS;P. NEGRI;S. NEMECEK;W. NEUMANN;N. NEUMEISTER;R. NICOLAIDOU;B. S. NIELSEN;M. NIEUWENHUIZEN;V. NIKOLAENKO;P. NISS;A. NOMEROTSKI;A. NORMAND;W. OBERSCHULTEBECKMANN;V. OBRAZTSOV;A. G. OLSHEVSKI;R. ORAVA;K. OSTERBERG;A. OURAOU;P. PAGANINI;M. PAGANONI;P. PAGES;H. PALKA;T. D. PAPADOPOULOU;L. PAPE;C. PARKES;F. PARODI;A. PASSERI;M. PEGORARO;L. PERALTA;H. PERNEGGER;M. PERNICKA;A. PERROTTA;C. PETRIDOU;A. PETROLINI;H. T. PHILLIPS;G. PIANA;F. PIERRE;M. PIMENTA;S. PLASZCZYNSKI;O. PODOBRIN;M. E. POL;G. POLOK;P. POROPAT;V. POZDNIAKOV;M. PREST;P. PRIVITERA;N. PUKHAEVA;A. PULLIA;D. RADOJICIC;S. RAGAZZI;H. RAHMANI;J. RAMES;P. N. RATOFF;A. L. READ;M. REALE;P. REBECCHI;N. G. REDAELLI;M. REGLER;D. REID;P. B. RENTON;L. K. RESVANIS;F. RICHARD;J. RICHARDSON;J. RIDKY;G. RINAUDO;I. RIPP;A. ROMERO;I. RONCAGLIOLO;P. RONCHESE;V. RONJIN;L. ROOS;E. I. ROSENBERG;E. ROSSO;P. ROUDEAU;T. ROVELLI;W. RUCKSTUHL;V. RUHLMANNKLEIDER;A. RUIZ;H. SAARIKKO;Y. SACQUIN;A. SADOVSKY;G. SAJOT;J. SALT;J. SANCHEZ;M. SANNINO;H. SCHNEIDER;M. A. E.;G. SCIOLLA;F. SCURI;Y. SEDYKH;A. M. SEGAR;A. SEITZ;R. SEKULIN;R. C. SHELLARD;I. SICCAMA;P. SIEGRIST;S. SIMONETTI;F. SIMONETTO;A. N. SISAKIAN;B. SITAR;T. B. SKAALI;G. SMADJA;N. SMIRNOV;O. SMIRNOVA;G. R. SMITH;R. SOSNOWSKI;D. SOUZASANTOS;T. SPASSOV;E. SPIRITI;S. SQUARCIA;H. STAECK;C. STANESCU;S. STAPNES;I. STAVITSKI;K. STEPANIAK;F. STICHELBAUT;A. STOCCHI;J. STRAUSS;R. STRUB;B. STUGU;M. SZCZEKOWSKI;M. SZEPTYCKA;T. TABARELLI;J. P. TAVERNET;O. TCHIKILEV;A. TILQUIN;J. TIMMERMANS;L. G. TKATCHEV;T. TODOROV;D. Z. TOET;A. TOMARADZE;B. TOME;L. TORTORA;G. TRANSTROMER;D. TREILLE;W. TRISCHUK;G. TRISTRAM;A. TROMBINI;C. TRONCON;A. TSIROU;M. L. TURLUER;I. A. TYAPKIN;M. TYNDEL;S. TZAMARIAS;B. UEBERSCHAER;S. UEBERSCHAER;O. ULLALAND;V. UVAROV;G. VALENTI;E. VALLAZZA;C. V. VELDE;G. W. VANAPELDOORN;P. VANDAM;W. K. VANDONINCK;J. VANELDIK;N. VASSILOPOULOS;G. VEGNI;L. VENTURA;W. VENUS;F. VERBEURE;M. VERLATO;L. S. VERTOGRADOV;D. VILANOVA;P. VINCENT;L. VITALE;E. VLASOV;A. S. VODOPYANOV;V. VRBA;H. WAHLEN;C. WALCK;F. WALDNER;A. WEHR;M. WEIERSTALL;P. WEILHAMMER;A. M. WETHERELL;D. WICKE;J. H. WICKENS;M. WIELERS;G. R. WILKINSON;W. S. C.;M. WINTER;M. WITEK;G. WORMSER;K. WOSCHNAGG;K. YIP;O. YUSHCHENKO;F. ZACH;C. ZACHARATOU;A. ZAITSEV;A. ZALEWSKA;P. ZALEWSKI;D. ZAVRTANIK;E. ZEVGOLATAKOS;N. I. ZIMIN;M. ZITO;D. ZONTAR;R. ZUBERI;G. C. ZUCCHELLI;G. ZUMERLE
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/103774
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 45
  • ???jsp.display-item.citation.isi??? 44
social impact